He will need to address that "tw*t" gaffe (his first Tweet could be a self-deprecating "I was a twit not to tweet until now") but he could soon be reaching hundreds of thousands of people during an election campaign with 140 character messages. I think Cameron would be good at it. It'll be a great medium for communicating in a warm, direct way.

Mr Cameron was cautious when I asked him if he'd join Twitter earlier today (watch here) but I'm convinced it's too good an opportunity to miss.